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Description

The AMS EVO VII/VIII/IX CNC Cylinder Head is the best performing and most developed design on the market. After countless hours of testing we came up with a port design that offers more than just peak flow numbers.

Flow bench numbers don’t always tell the whole story. Most vendors just state their peak flow at max lift. Their head may flow 270 CFM at .500 lift but what about flow at lower lifts? The flow at low, mid and high lift has to be balanced a certain way to achieve the most effective power curve. We have developed a CNC program that not only brings consistent performance and quality but also makes the most power of any head that we’ve ever tested including our old design!

*We do flow testing down to .050″ because low lift flow and good data resolution are important.Features

Best performing and most developed design on the market

CNC ported for optimum flow, performance and consistency across the head

+1mm AMS Spec. valves increase flow and performance

High heat tolerant Inconel exhaust valves add durability

Performance valve springs for maximum performance up to 10,000 rpm

Suitable for even aggressive high lift camshafts

Precisely hand finished runners, chambers and blending of bowl area

Available on a core exchange or for outright purchase

Professionally assembled by AMS engine technicians

Includes

CNC machine ported head with precise hand finishing

AMS Spec. 1mm over Inconel exhaust valves

AMS Spec. 1mm over stainless steel intake valves

GSC beehive valve springs

Manganese bronze valve guides

Applications

Mitsubishi Evolution 7,8,9

Fits all USDM, JDM and European Models

Please Note

Due to increased runner size the intake manifold gasket must port matched slightly so it does not obstruct airflow

Core Charge Requirements

In order to avoid paying the core charge for our CNC cylinder head program we need a healthy Cylinder head including valve spring seats, Keepers and cam caps. Stock cams, valves and valve springs are not necessary to send in.

Additional information

Weight

40 lbs

Dimensions

25 x 13 x 13 in

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THE ULTIMATE IN PERFORMANCE

The goal of AMS is to provide the highest quality, best performing products available. By
utilizing research and development and rigorous testing programs AMS will never compromise the
quality or performance of our products.